The name Isabelle is a girl's name of French origin meaning "pledged to God". Isabelle is ranked #103 on our popularity charts and is often added to lists like Fictional Princess Names and discussed in our forums with posts like "What would be the perfect twin?".
From the experts:
Isabelle and all her beautiful sisters have risen quickly through the ranks over the past decade or so to dominate their mother name, Elizabeth. Isabelle's a name about which everything is lovely, except how many other little Isabelles you'll meet.
Jeff Bridges has a grown daughter named Isabelle, while more recently Kerry Washington used it for her daughter.